Universal Features of Turbulent/Non-turbulent and Turbulent/Turbulent Interfaces

被引：0
|
作者：
Alves, Pedro D. [1 ]
Zecchetto, Marco [1 ]
Xavier, Ricardo P. [1 ]
Buxton, Oliver [2 ]
da Silva, Carlos B. [1 ]
机构：
[1] Univ Lisbon, Inst Super Tec, Lisbon, Portugal
[2] Imperial Coll London, Dept Aeronaut, London SW7 2AZ, England
来源：
PROCEEDINGS OF THE IUTAM SYMPOSIUM ON TURBULENT/NON-TURBULENT INTERFACE IN TURBULENT SHEAR FLOWS | 2025年 / 45卷
关键词：
Turbulent/non-turbulent interface (TNTI); Turbulent/turbulent interface (TTI); Free shear flows; Turbulent entrainment; ENTRAINMENT;
D O I：
10.1007/978-3-031-78151-3_7
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The characteristics of turbulent/non-turbulent interfaces and turbulent/turbulent interfaces (TNTI and TTI) are analysed by new carefully designed direct numerical simulations (DNS). Whereas TNTIs separate the turbulent from the non-turbulent region in free shear flows and turbulent boundary layers, TTIs appear whenever two regions of distinct turbulent characteristics interact such as in turbulent jets and wakes surrounded by external turbulent flow, or strongly perturbed turbulent boundary layers, i.e., when the external flow is in turbulent condition. Direct numerical simulations (DNS) of temporally evolving and spatially evolving TTIs are carried out to analyse the conditional mean profiles of enstrophy. Preliminary results suggest that, if properly normalised using the mean local Kolmogorov velocity and length scale, these conditional mean profiles are universal.
引用
收藏
页码：94 / 109
页数：16
相关论文
共 50 条
  • [1] Modulations of turbulent/non-turbulent interfaces by particles in turbulent boundary layers
    Wei, Qingqing
    Wang, Ping
    Zheng, Xiaojing
    JOURNAL OF FLUID MECHANICS, 2024, 983
  • [2] Turbulent/non-turbulent interfaces detected in DNS of incompressible turbulent boundary layers
    Watanabe, T.
    Zhang, X.
    Nagata, K.
    PHYSICS OF FLUIDS, 2018, 30 (03)
  • [3] TURBULENT NON-TURBULENT INTERFACE
    PAIZIS, S
    SCHWARZ, WH
    BULLETIN OF THE AMERICAN PHYSICAL SOCIETY, 1971, 16 (11): : 1323 - &
  • [4] Turbulent/non-turbulent interfaces in wakes in stably stratified fluids
    Watanabe, Tomoaki
    Riley, James J.
    de Bruyn Kops, Stephen M.
    Diamessis, Peter J.
    Zhou, Qi
    JOURNAL OF FLUID MECHANICS, 2016, 797
  • [5] Evolution of the turbulent/non-turbulent interface of an axisymmetric turbulent jet
    Khashehchi, M.
    Ooi, A.
    Soria, J.
    Marusic, I.
    EXPERIMENTS IN FLUIDS, 2013, 54 (01)
  • [6] Geometrical aspects of turbulent/non-turbulent interfaces with and without mean shear
    Watanabe, Tomoaki
    da Silva, Carlos B.
    Nagata, Koji
    Sakai, Yasuhiko
    PHYSICS OF FLUIDS, 2017, 29 (08)
  • [7] Turbulent/non-turbulent interfaces in temporally evolving compressible planar jets
    Nagata, R.
    Watanabe, T.
    Nagata, K.
    PHYSICS OF FLUIDS, 2018, 30 (10)
  • [8] Evolution of the turbulent/non-turbulent interface of an axisymmetric turbulent jet
    M. Khashehchi
    A. Ooi
    J. Soria
    I. Marusic
    Experiments in Fluids, 2013, 54
  • [9] Local Properties of the Turbulent/Non-turbulent Interface
    Er, Sarp
    Laval, Jean-Philippe
    Vassilicos, Christos
    PROCEEDINGS OF THE IUTAM SYMPOSIUM ON TURBULENT/NON-TURBULENT INTERFACE IN TURBULENT SHEAR FLOWS, 2025, 45 : 48 - 65
  • [10] TURBULENT NON-TURBULENT DECISIONS IN AN INTERMITTENT FLOW
    HEDLEY, TB
    KEFFER, JF
    JOURNAL OF FLUID MECHANICS, 1974, 64 (JUL24) : 625 - 644
12345